621874459 has 2 divisors, whose sum is σ = 621874460. Its totient is φ = 621874458.

The previous prime is 621874447. The next prime is 621874481. The reversal of 621874459 is 954478126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621874459 - 2²⁷ = 487656731 is a prime.

It is not a weakly prime, because it can be changed into another prime (621874439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310937229 + 310937230.

It is an arithmetic number, because the mean of its divisors is an integer number (310937230).

Almost surely, 2^621874459 is an apocalyptic number.

621874459 is a deficient number, since it is larger than the sum of its proper divisors (1).

621874459 is an equidigital number, since it uses as much as digits as its factorization.

621874459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 621874459 is about 24937.4108319208. The cubic root of 621874459 is about 853.5603642786.

The spelling of 621874459 in words is "six hundred twenty-one million, eight hundred seventy-four thousand, four hundred fifty-nine".